Mercurial > libervia-web
annotate browser_side/base_widget.py @ 195:dd27072d8ae0
browser side: widgets refactoring:
- moved base widgets in a base_widget module
- widgets class now register themselves their Drag/Drop type
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Mon, 04 Mar 2013 23:01:57 +0100 |
| parents | browser_side/panels.py@6198be95a39c |
| children | c2639c9f86ea |
| rev | line source |
|---|---|
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1 #!/usr/bin/python |
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2 # -*- coding: utf-8 -*- |
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3 |
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4 """ |
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5 Libervia: a Salut à Toi frontend |
| 165 | 6 Copyright (C) 2011, 2012, 2013 Jérôme Poisson <goffi@goffi.org> |
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7 |
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8 This program is free software: you can redistribute it and/or modify |
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9 it under the terms of the GNU Affero General Public License as published by |
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10 the Free Software Foundation, either version 3 of the License, or |
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11 (at your option) any later version. |
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12 |
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13 This program is distributed in the hope that it will be useful, |
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 GNU Affero General Public License for more details. |
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17 |
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18 You should have received a copy of the GNU Affero General Public License |
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19 along with this program. If not, see <http://www.gnu.org/licenses/>. |
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20 """ |
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21 |
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22 import pyjd # this is dummy in pyjs |
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23 from pyjamas.ui.SimplePanel import SimplePanel |
| 33 | 24 from pyjamas.ui.AbsolutePanel import AbsolutePanel |
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25 from pyjamas.ui.VerticalPanel import VerticalPanel |
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26 from pyjamas.ui.HorizontalPanel import HorizontalPanel |
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27 from pyjamas.ui.ScrollPanel import ScrollPanel |
| 195 | 28 from pyjamas.ui.FlexTable import FlexTable |
| 23 | 29 from pyjamas.ui.TabPanel import TabPanel |
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30 from pyjamas.ui.HTMLPanel import HTMLPanel |
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31 from pyjamas.ui.Label import Label |
| 83 | 32 from pyjamas.ui.Button import Button |
| 33 from pyjamas.ui.Image import Image | |
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34 from pyjamas.ui.DropWidget import DropWidget |
| 19 | 35 from pyjamas.ui.ClickListener import ClickHandler |
| 83 | 36 from pyjamas.ui import HasAlignment |
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37 from pyjamas import DOM |
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38 import dialog |
| 195 | 39 from pyjamas import Window |
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40 from __pyjamas__ import doc |
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41 |
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42 class DropCell(DropWidget): |
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43 """Cell in the middle grid which replace itself with the dropped widget on DnD""" |
| 195 | 44 drop_keys = {} |
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45 |
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46 def __init__(self, host): |
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47 DropWidget.__init__(self) |
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48 self.host = host |
| 83 | 49 self.setStyleName('dropCell') |
| 195 | 50 |
| 51 @classmethod | |
| 52 def addDropKey(cls, key, callback): | |
| 53 DropCell.drop_keys[key] = callback | |
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54 |
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55 def onDragEnter(self, event): |
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56 self.addStyleName('dragover') |
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57 DOM.eventPreventDefault(event) |
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58 |
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59 def onDragLeave(self, event): |
| 33 | 60 if event.clientX <= self.getAbsoluteLeft() or event.clientY <= self.getAbsoluteTop() or\ |
| 61 event.clientX >= self.getAbsoluteLeft() + self.getOffsetWidth()-1 or event.clientY >= self.getAbsoluteTop() + self.getOffsetHeight()-1: | |
| 62 #We check that we are inside widget's box, and we don't remove the style in this case because | |
| 63 #if the mouse is over a widget inside the DropWidget, if will leave the DropWidget, and we | |
| 64 #don't want that | |
| 65 self.removeStyleName('dragover') | |
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66 |
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67 def onDragOver(self, event): |
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68 DOM.eventPreventDefault(event) |
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69 |
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70 def _getCellAndRow(self, grid, event): |
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71 """Return cell and row index where the event is occuring""" |
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72 cell = grid.getEventTargetCell(event) |
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73 row = DOM.getParent(cell) |
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74 return (row.rowIndex, cell.cellIndex) |
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75 |
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76 |
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77 def onDrop(self, event): |
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78 dt = event.dataTransfer |
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79 #'text', 'text/plain', and 'Text' are equivalent. |
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80 try: |
| 62 | 81 item, item_type = dt.getData("text/plain").split('\n') #Workaround for webkit, only text/plain seems to be managed |
| 82 if item_type and item_type[-1] == '\0': #Workaround for what looks like a pyjamas bug: the \0 should not be there, and | |
| 83 item_type = item_type[:-1] # .strip('\0') and .replace('\0','') don't work. TODO: check this and fill a bug report | |
| 84 #item_type = dt.getData("type") | |
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85 print "message: %s" % item |
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86 print "type: %s" % item_type |
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87 except: |
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88 print "no message found" |
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89 item=' ' |
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90 item_type = None |
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91 DOM.eventPreventDefault(event) |
| 195 | 92 if item_type in self.drop_keys: |
| 93 _new_panel = self.drop_keys[item_type](self.host,item) | |
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94 else: |
| 84 | 95 return False |
| 96 if isinstance(self, LiberviaWidget): | |
| 97 self.host.unregisterWidget(self) | |
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98 self.onQuit() |
| 84 | 99 if not isinstance(_new_panel, LiberviaWidget): |
| 100 print ('WARNING: droping an object which is not a class of LiberviaWidget') | |
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101 _flextable = self.getParent() |
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102 _widgetspanel = _flextable.getParent().getParent() |
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103 row_idx, cell_idx = self._getCellAndRow(_flextable, event) |
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104 if self.host.getSelected == self: |
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105 self.host.setSelected(None) |
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106 _widgetspanel.changeWidget(row_idx, cell_idx, _new_panel) |
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107 """_unempty_panels = filter(lambda wid:not isinstance(wid,EmptyWidget),list(_flextable)) |
| 34 | 108 _width = 90/float(len(_unempty_panels) or 1) |
| 109 #now we resize all the cell of the column | |
| 110 for panel in _unempty_panels: | |
| 111 td_elt = panel.getElement().parentNode | |
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112 DOM.setStyleAttribute(td_elt, "width", "%s%%" % _width)""" |
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113 #FIXME: delete object ? Check the right way with pyjamas |
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114 |
| 84 | 115 class LiberviaWidget(DropCell, VerticalPanel, ClickHandler): |
| 83 | 116 """Libervia's widget which can replace itself with a dropped widget on DnD""" |
| 117 | |
| 84 | 118 def __init__(self, host, title='', selectable=False): |
| 119 """Init the widget | |
| 120 @param host: SatWebFrontend object | |
| 121 @param title: title show in the header of the widget | |
| 122 @param selectable: True is widget can be selected by user""" | |
| 83 | 123 VerticalPanel.__init__(self) |
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124 DropCell.__init__(self, host) |
| 84 | 125 ClickHandler.__init__(self) |
| 126 self.__selectable = selectable | |
| 127 self.__title_id = HTMLPanel.createUniqueId() | |
| 128 self.__setting_button_id = HTMLPanel.createUniqueId() | |
| 129 self.__close_button_id = HTMLPanel.createUniqueId() | |
| 83 | 130 header = AbsolutePanel() |
| 84 | 131 self.__title = Label(title) |
| 132 self.__title.setStyleName('widgetHeader_title') | |
| 133 header.add(self.__title) | |
| 83 | 134 button_group_wrapper = SimplePanel() |
| 135 button_group_wrapper.setStyleName('widgetHeader_buttonsWrapper') | |
| 136 button_group = HorizontalPanel() | |
| 137 button_group.setStyleName('widgetHeader_buttonGroup') | |
| 138 setting_button = Image("media/icons/misc/settings.png") | |
| 139 setting_button.setStyleName('widgetHeader_settingButton') | |
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140 setting_button.addClickListener(self.onSetting) |
| 83 | 141 close_button = Image("media/icons/misc/close.png") |
| 142 close_button.setStyleName('widgetHeader_closeButton') | |
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143 close_button.addClickListener(self.onClose) |
| 83 | 144 button_group.add(setting_button) |
| 145 button_group.add(close_button) | |
| 146 button_group_wrapper.setWidget(button_group) | |
| 147 header.add(button_group_wrapper) | |
| 148 self.add(header) | |
| 149 header.addStyleName('widgetHeader') | |
| 150 self.setSize('100%', '100%') | |
| 151 self.addStyleName('widget') | |
| 84 | 152 if self.__selectable: |
| 153 self.addClickListener(self) | |
| 154 self.host.registerWidget(self) | |
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155 |
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156 def _getWidgetsPanel(self): |
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157 current = self |
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158 while current is not None and current.__class__ != WidgetsPanel: |
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159 current = current.getParent() |
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160 if current is None: |
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161 print "Error: can't find WidgetsPanel" |
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162 return current |
| 84 | 163 |
| 164 def onClick(self, sender): | |
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165 self.host.setSelected(self) |
| 83 | 166 |
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167 def onClose(self, sender): |
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168 """ Called when the close button is pushed """ |
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169 _widgetspanel = self._getWidgetsPanel() |
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170 _widgetspanel.removeWidget(self) |
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171 self.onQuit() |
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172 |
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173 def onQuit(self): |
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174 """ Called when the widget is actually ending """ |
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175 pass |
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176 |
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177 def onSetting(self, sender): |
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178 widpanel = self._getWidgetsPanel() |
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179 row, col = widpanel.getIndex(self) |
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180 body = VerticalPanel() |
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181 |
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182 #colspan & rowspan |
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183 colspan = widpanel.getColSpan(row, col) |
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184 rowspan = widpanel.getRowSpan(row, col) |
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185 def onColSpanChange(value): |
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186 widpanel.setColSpan(row, col, value) |
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187 def onRowSpanChange(value): |
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188 widpanel.setRowSpan(row, col, value) |
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189 colspan_setter = dialog.IntSetter("Columns span", colspan) |
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190 colspan_setter.addValueChangeListener(onColSpanChange) |
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191 colspan_setter.setWidth('100%') |
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192 rowspan_setter = dialog.IntSetter("Rows span", rowspan) |
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193 rowspan_setter.addValueChangeListener(onRowSpanChange) |
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194 rowspan_setter.setWidth('100%') |
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195 body.add(colspan_setter) |
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196 body.add(rowspan_setter) |
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197 |
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198 #size |
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199 width_str = self.getWidth() |
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200 if width_str.endswith('px'): |
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201 width=int(width_str[:-2]) |
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202 else: |
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203 width = 0 |
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204 height_str = self.getHeight() |
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205 if height_str.endswith('px'): |
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206 height=int(height_str[:-2]) |
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207 else: |
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208 height = 0 |
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209 def onWidthChange(value): |
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210 if not value: |
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211 self.setWidth('100%') |
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212 else: |
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213 self.setWidth('%dpx' % value) |
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214 def onHeightChange(value): |
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215 if not value: |
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216 self.setHeight('100%') |
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217 else: |
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218 self.setHeight('%dpx' % value) |
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219 width_setter = dialog.IntSetter("width (0=auto)", width) |
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220 width_setter.addValueChangeListener(onWidthChange) |
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221 width_setter.setWidth('100%') |
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222 height_setter = dialog.IntSetter("height (0=auto)", height) |
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223 height_setter.addValueChangeListener(onHeightChange) |
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224 height_setter.setHeight('100%') |
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225 body.add(width_setter) |
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226 body.add(height_setter) |
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227 |
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228 #reset |
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229 def onReset(sender): |
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230 colspan_setter.setValue(1) |
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231 rowspan_setter.setValue(1) |
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232 width_setter.setValue(0) |
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233 height_setter.setValue(0) |
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234 |
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235 reset_bt = Button("Reset", onReset) |
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236 body.add(reset_bt) |
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237 body.setCellHorizontalAlignment(reset_bt, HasAlignment.ALIGN_CENTER) |
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238 |
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239 _dialog = dialog.GenericDialog("Widget setting", body) |
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240 _dialog.show() |
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241 |
| 83 | 242 def setTitle(self, text): |
| 243 """change the title in the header of the widget | |
| 244 @param text: text of the new title""" | |
| 84 | 245 self.__title.setText(text) |
| 246 | |
| 247 def isSelectable(self): | |
| 248 return self.__selectable | |
| 249 | |
| 250 def setSelectable(self, selectable): | |
| 251 if not self.__selectable: | |
| 252 try: | |
| 253 self.removeClickListener(self) | |
| 254 except ValueError: | |
| 255 pass | |
| 256 if self.selectable and not self in self._clickListeners: | |
| 257 self.addClickListener(self) | |
| 258 self.__selectable = selectable | |
| 83 | 259 |
| 260 def setWidget(self, widget, scrollable=True): | |
| 261 """Set the widget that will be in the body of the LiberviaWidget | |
| 262 @param widget: widget to put in the body | |
| 263 @param scrollable: if true, the widget will be in a ScrollPanelWrapper""" | |
| 264 if scrollable: | |
| 265 _scrollpanelwrapper = ScrollPanelWrapper() | |
| 266 _scrollpanelwrapper.setStyleName('widgetBody') | |
| 267 _scrollpanelwrapper.setWidget(widget) | |
| 268 body_wid = _scrollpanelwrapper | |
| 269 else: | |
| 270 body_wid = widget | |
| 271 self.add(body_wid) | |
| 272 self.setCellHeight(body_wid, '100%') | |
| 273 | |
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274 def doDetachChildren(self): |
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275 #We need to force the use of a panel subclass method here, |
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276 #for the same reason as doAttachChildren |
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277 VerticalPanel.doDetachChildren(self) |
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278 |
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279 def doAttachChildren(self): |
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280 #We need to force the use of a panel subclass method here, else |
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281 #the event will not propagate to children |
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282 VerticalPanel.doAttachChildren(self) |
| 83 | 283 |
| 34 | 284 class ScrollPanelWrapper(SimplePanel): |
| 285 """Scroll Panel like component, wich use the full available space | |
| 286 to work around percent size issue, it use some of the ideas found | |
| 287 here: http://code.google.com/p/google-web-toolkit/issues/detail?id=316 | |
| 288 specially in code given at comment #46, thanks to Stefan Bachert""" | |
| 289 | |
| 290 def __init__(self, *args, **kwargs): | |
| 291 SimplePanel.__init__(self) | |
| 292 self.spanel = ScrollPanel(*args, **kwargs) | |
| 293 SimplePanel.setWidget(self, self.spanel) | |
| 294 DOM.setStyleAttribute(self.getElement(), "position", "relative") | |
| 295 DOM.setStyleAttribute(self.getElement(), "top", "0px") | |
| 296 DOM.setStyleAttribute(self.getElement(), "left", "0px") | |
| 297 DOM.setStyleAttribute(self.getElement(), "width", "100%") | |
| 298 DOM.setStyleAttribute(self.getElement(), "height", "100%") | |
| 299 DOM.setStyleAttribute(self.spanel.getElement(), "position", "absolute") | |
| 300 DOM.setStyleAttribute(self.spanel.getElement(), "width", "100%") | |
| 301 DOM.setStyleAttribute(self.spanel.getElement(), "height", "100%") | |
| 302 | |
| 303 def setWidget(self, widget): | |
| 304 self.spanel.setWidget(widget) | |
| 305 | |
| 306 def setScrollPosition(self, position): | |
| 307 self.spanel.setScrollPosition(position) | |
| 308 | |
| 309 def scrollToBottom(self): | |
| 310 self.setScrollPosition(self.spanel.getElement().scrollHeight) | |
| 311 | |
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312 class EmptyWidget(DropCell, SimplePanel): |
|
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313 """Empty dropable panel""" |
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314 |
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315 def __init__(self, host): |
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316 SimplePanel.__init__(self) |
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317 DropCell.__init__(self, host) |
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318 #self.setWidget(HTML('')) |
| 83 | 319 self.setSize('100%','100%') |
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320 |
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321 class BorderWidget(EmptyWidget): |
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322 def __init__(self, host): |
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323 EmptyWidget.__init__(self, host) |
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324 self.addStyleName('borderPanel') |
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325 |
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326 class LeftBorderWidget(BorderWidget): |
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327 def __init__(self, host): |
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328 BorderWidget.__init__(self, host) |
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329 self.addStyleName('leftBorderWidget') |
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330 |
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331 class RightBorderWidget(BorderWidget): |
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332 def __init__(self, host): |
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333 BorderWidget.__init__(self, host) |
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334 self.addStyleName('rightBorderWidget') |
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335 |
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336 class BottomBorderWidget(BorderWidget): |
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337 def __init__(self, host): |
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338 BorderWidget.__init__(self, host) |
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339 self.addStyleName('bottomBorderWidget') |
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340 |
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341 class WidgetsPanel(ScrollPanelWrapper): |
| 83 | 342 |
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343 def __init__(self, host, locked = False): |
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344 ScrollPanelWrapper.__init__(self) |
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345 self.setSize('100%', '100%') |
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346 self.host = host |
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347 self.locked = locked #if True: tab will not be removed when there are no more widgets inside |
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348 self.selected = None |
| 83 | 349 self.flextable = FlexTable() |
| 350 self.flextable.setSize('100%','100%') | |
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351 self.setWidget(self.flextable) |
| 83 | 352 self.setStyleName('widgetsPanel') |
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353 _bottom = BottomBorderWidget(self.host) |
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354 self.flextable.setWidget(0, 0, _bottom) #There will be always an Empty widget on the last row, |
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355 #dropping a widget there will add a new row |
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356 td_elt = _bottom.getElement().parentNode |
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357 DOM.setStyleAttribute(td_elt, "height", "1px") #needed so the cell adapt to the size of the border (specially in webkit) |
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358 self._max_cols = 1 #give the maximum number of columns i a raw |
| 83 | 359 |
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360 def isLocked(self): |
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361 return self.locked |
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362 |
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363 def changeWidget(self, row, col, wid): |
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364 """Change the widget in the given location, add row or columns when necessary""" |
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365 print "changing widget:", wid, row, col |
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366 last_row = max(0, self.flextable.getRowCount()-1) |
| 83 | 367 try: |
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368 prev_wid = self.flextable.getWidget(row, col) |
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369 except: |
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370 print "ERROR: Trying to change an unexisting widget !" |
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371 return |
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372 |
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373 |
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374 cellFormatter = self.flextable.getFlexCellFormatter() |
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375 |
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376 if isinstance(prev_wid, BorderWidget): |
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377 #We are on a border, we must create a row and/or columns |
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378 print "BORDER WIDGET" |
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379 prev_wid.removeStyleName('dragover') |
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380 |
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381 if isinstance(prev_wid, BottomBorderWidget): |
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382 #We are on the bottom border, we create a new row |
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383 self.flextable.insertRow(last_row) |
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384 self.flextable.setWidget(last_row, 0, LeftBorderWidget(self.host)) |
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385 self.flextable.setWidget(last_row, 1, wid) |
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386 self.flextable.setWidget(last_row, 2, RightBorderWidget(self.host)) |
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387 cellFormatter.setHorizontalAlignment(last_row, 2, HasAlignment.ALIGN_RIGHT) |
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388 row = last_row |
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389 |
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390 elif isinstance(prev_wid, LeftBorderWidget): |
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391 if col!=0: |
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392 print "ERROR: LeftBorderWidget must be on the first column !" |
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393 return |
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394 self.flextable.insertCell(row, col+1) |
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395 self.flextable.setWidget(row, 1, wid) |
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396 |
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397 elif isinstance(prev_wid, RightBorderWidget): |
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398 if col!=self.flextable.getCellCount(row)-1: |
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399 print "ERROR: RightBorderWidget must be on the last column !" |
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400 return |
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401 self.flextable.insertCell(row, col) |
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402 self.flextable.setWidget(row, col, wid) |
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403 |
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404 else: |
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405 prev_wid.removeFromParent() |
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406 self.flextable.setWidget(row, col, wid) |
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407 |
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408 _max_cols = max(self._max_cols, self.flextable.getCellCount(row)) |
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409 if _max_cols != self._max_cols: |
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410 self._max_cols = _max_cols |
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411 self._sizesAdjust() |
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412 |
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413 def _sizesAdjust(self): |
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414 cellFormatter = self.flextable.getFlexCellFormatter() |
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415 width = 100.0/max(1, self._max_cols-2) #we don't count the borders |
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416 |
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417 for row_idx in xrange(self.flextable.getRowCount()): |
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418 for col_idx in xrange(self.flextable.getCellCount(row_idx)): |
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419 _widget = self.flextable.getWidget(row_idx, col_idx) |
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420 if not isinstance(_widget, BorderWidget): |
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421 td_elt = _widget.getElement().parentNode |
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422 DOM.setStyleAttribute(td_elt, "width", "%.2f%%" % width) |
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423 |
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424 last_row = max(0, self.flextable.getRowCount()-1) |
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425 cellFormatter.setColSpan(last_row, 0, self._max_cols) |
| 178 | 426 |
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427 def addWidget(self, wid): |
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428 """Add a widget to a new cell on the next to last row""" |
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429 last_row = max(0, self.flextable.getRowCount()-1) |
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430 print "putting widget %s at %d, %d" % (wid, last_row, 0) |
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431 self.changeWidget(last_row, 0, wid) |
| 83 | 432 |
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433 def removeWidget(self, wid): |
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434 """Remove a widget and the cell where it is""" |
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435 _row, _col = self.flextable.getIndex(wid) |
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436 self.flextable.remove(wid) |
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437 self.flextable.removeCell(_row, _col) |
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438 if self.flextable.getCellCount(_row) == 2: #we have only the borders left, we remove the row |
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439 self.flextable.removeRow(_row) |
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440 _max_cols = 1 |
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441 for row_idx in xrange(self.flextable.getRowCount()): |
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442 _max_cols = max(_max_cols, self.flextable.getCellCount(row_idx)) |
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443 if _max_cols != self._max_cols: |
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444 self._max_cols = _max_cols |
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445 self._sizesAdjust() |
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446 current = self |
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447 |
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448 blank_page = not [wid for wid in self.flextable if isinstance(wid, LiberviaWidget)] # do we still have widgets on the page ? |
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449 |
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450 if blank_page and not self.isLocked(): |
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451 #we now notice the MainTabPanel that the WidgetsPanel is empty and need to be removed |
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452 while current is not None: |
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453 if isinstance(current, MainTabPanel): |
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454 current.onWidgetPanelRemove(self) |
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455 return |
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456 current = current.getParent() |
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457 print "Error: no MainTabPanel found !" |
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458 |
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459 def getIndex(self, wid): |
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460 return self.flextable.getIndex(wid) |
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461 |
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462 def getColSpan(self, row, col): |
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463 cellFormatter = self.flextable.getFlexCellFormatter() |
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464 return cellFormatter.getColSpan(row, col) |
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465 |
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466 def setColSpan(self, row, col, value): |
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467 cellFormatter = self.flextable.getFlexCellFormatter() |
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468 return cellFormatter.setColSpan(row, col, value) |
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469 |
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470 def getRowSpan(self, row, col): |
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471 cellFormatter = self.flextable.getFlexCellFormatter() |
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472 return cellFormatter.getRowSpan(row, col) |
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473 |
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474 def setRowSpan(self, row, col, value): |
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475 cellFormatter = self.flextable.getFlexCellFormatter() |
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476 return cellFormatter.setRowSpan(row, col, value) |
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477 |
| 34 | 478 class MainTabPanel(TabPanel): |
| 23 | 479 |
| 480 def __init__(self, host): | |
| 33 | 481 TabPanel.__init__(self) |
| 23 | 482 self.host=host |
| 483 self.tabBar.setVisible(False) | |
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484 self.setStyleName('liberviaTabPanel') |
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485 self.addStyleName('mainTabPanel') |
| 33 | 486 Window.addWindowResizeListener(self) |
| 487 | |
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488 def getCurrentPanel(self): |
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489 """ Get the panel of the currently selected tab """ |
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490 return self.deck.visibleWidget |
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491 |
| 33 | 492 def onWindowResized(self, width, height): |
| 493 tab_panel_elt = self.getElement() | |
| 494 _elts = doc().getElementsByClassName('gwt-TabBar') | |
| 495 if not _elts.length: | |
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496 print ("ERROR: no TabBar found, it should exist !") |
| 33 | 497 tab_bar_h = 0 |
| 498 else: | |
| 499 tab_bar_h = _elts.item(0).offsetHeight | |
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500 ideal_height = height - DOM.getAbsoluteTop(tab_panel_elt) - tab_bar_h - 5 |
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501 ideal_width = width - DOM.getAbsoluteLeft(tab_panel_elt) - 5 |
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502 self.setWidth("%s%s" % (ideal_width, "px")); |
| 33 | 503 self.setHeight("%s%s" % (ideal_height, "px")); |
| 23 | 504 |
| 505 def add(self, widget, tabText=None, asHTML=False): | |
| 506 TabPanel.add(self, widget, tabText, asHTML) | |
| 507 if self.getWidgetCount()>1: | |
| 508 self.tabBar.setVisible(True) | |
| 33 | 509 self.host.resize() |
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510 |
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511 def onWidgetPanelRemove(self, panel): |
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512 """ Called when a child WidgetsPanel is empty and need to be removed """ |
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513 self.remove(panel) |
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514 widgets_count = self.getWidgetCount() |
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515 if widgets_count == 1: |
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516 self.tabBar.setVisible(False) |
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517 self.host.resize() |
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518 self.selectTab(0) |
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519 else: |
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520 self.selectTab(widgets_count - 1) |
| 23 | 521 |